Improvement in car-brakes



PATENT FRANK M. CHAPMAN, OF NEW YORK, N. Y.

IMPROVEMENT IN CAR-BRAKES.

Specification forming part of Letters Patent No. 133,629, dated December 3, 1872.

have invented certain Improvements in Can Brakes, of which the following is a specification This invention consists in a combination of devices constituting a car-brake, to be operated by being thrown into and held in gear withthe car-axle as it revolves, and by being released from the same, thus utilizing as a power the. force and motion of the wheels and axle of the truck.

Referring to the accompanying drawing, Figure 1 is a bottom view of the brake; Fig. 2 is a section on the line 00 w Fig. 3 is a section on the line 3 y; Fig. 4 is a plan view; Fig. '5 is an enlarged section of shaft, 850.; and Fig. 6 is a section on the line 2 z.

A A is the frame of the truck. B and B are the axles. U is a cog-wheel on the axle B. E is a shifting-shaft having a projecting groove, G, to receive the prongs S of the brake'lever K, and having elongated bearings ca'ud c and a projecting pin, L. F is a thimble fitting over the bearing 0, and having the ratchets H and H and a notch, 12, to receive the pawls i and 'i and the pin L. The shaft and thimble are supported in hangers. I) is a cog-wheel on the shaft E to operate with the cog-wheel O, and to be thrown in and out of gear with it, by means of the shifting-shatt E and the thimble F and their attachments. The lever K has a lateral vibrating motion when moved by the pedal a, in consequence of the pivots d and d and the slot 0. P, P, and P are the chains attached to the centers of the brakebars M and lever It, and to the thimble F. The brake-bars are suspended from the frame by flexible supports. The ratchets are operated by rods h and h levers c and c, and pedals b and b.

Pressure upon the right-hand side of the pedal a pushes the shaft E into the thimble F, and, consequently, the pin Linto the notch n, at the same time the two cog-wheels are thrown into gear. The car being in motion, motion is thus communicated to the thimble F, around which the chain P is consequently wound, thereby drawing forward one end of the lever B, and transmitting draft to the chains P and P and to the brake-bars, thus forcing the brake-shoes upon the wheels to retard their motion.

I claim as my invention 1'. In a car-brake, the combination of the shaft E having bearingse and e, the projecting groove G and the pin L, the thimble F having ratchets H and H and the notch n, the cogwheel D, the cog-wheel G on the axle B, the lever K, and the pawlsi and i, all constructed and arranged substantially as set forth.

2. A carrbrake, consisting essentially'ofpedal a, lever K, shaft E, thimble F, cog-wheel D, cog-wheel O on the axle B, ratchets H and H,rods h and h, pedals b and b, chain P, lever B, chains P and P, and brake-bars M having brake-shoes, all constructed, combined, and arranged in relation to a car or truck, substantially as set forth.

FRANK M. CHAPMAN.

Witnesses W. H. HAMILTON, ISAIAH HANNA. 

